Yarn-tensioning device



May 26. 1925. 1,539,408

A. M. PIGEON YARN TENS IONING DEVICE Filed Dec. 19, 1923 2 Sheets-Sheet1 JA A [hue/#01: Albert/K Pigeon. WITNESSES: D ccl' Adminslrdrix May 26,1925. 1,539,408 I A. M. PIGEON YARN TENS IONING DEVI CE Filed Dec. 19,1925 2 Sheets-Sheet 2 III/619k: AZZer/M.P1:ge0/z,17ecea sed -WITNESSES:

TTORNEYS.

Patented May 26, 1925.

UNITED STATES PATENT OFFICE.

ALBERT M. PIGEON, DECEASED, LATE OF M. PIGEON, ADMINISTRATRIX, O

NORRISTOWN, PENNSYLVANIA; BY ANNA F NORRISTOWN, PENNSYLVANIA.

YARN-TENSIONING DEVICE.

Application filed December 19, 1923. Serial No. 681,572.

To all whom it may concern.

Be it known that I, ANNA M. PIGEON, a citizen of the United Statesresiding at 'Norristown, in the county of Montgomery and State ofPennsylvania, administratrix of the estate of ALBERT M. PIGEON,deceased, do hereby declare that he invented certain new and usefulImprovements in Yarn-Tensioning Devices, whereof the following is aspecification, reference being had to the accompanying drawin s.

This invention re ates generally to yarn tension devices, and moreparticularly to a type especially useful in connection with conewindingmachinery.

1, In such machinery, the yarn is wound into cones upon spindles usuallydriven at a constant rate of speed. follows therefore, that the speed ofthe yarn must increase in the course of the building of a cone owing tothe gradually enlarging diameter of the same. As a result, 1n theabsence of any compensative provisions, the tension or drag on the yarnis proportionately magnified, thus causing uneven winding, and in mostcases, distortion of the cones. 4

This invention is directed primarily to overcoming the difficultiesnoted, and to the provision of means capable of maintaining uniform dragor tension on the yarn not withstanding changes in its linear speedduring cone building.

Other subsidiary objects, together with their attendant advantages, willbecome readily apparent from the description which follows of a typicalembodiment of the invention; while the scope thereof, in so far as itcomes within present knowledge, is clearly defined in the appendedclaims.

In the drawings Fig. I is an illustration of a standard cone windingmachine showing the manner in which my improved yarn tension device isassociatedtherewith.

Fig. II is a perspective view of the tension device on a somewhat largerscale than represented in Fig. I.

A Fig. III is a detail cross sectional View of the device taken asindicated by the arrows IIIIII in Fig. II.

It consequently rate of linear Fig. IV is a fragmentary elevationshowing the details of a stop which functions to limit the movements ofthe instrumentalities.

Fig. V is a detail cross sectional view taken as indicated by the arrowsVV in Fig. IV.

Fig. VI is an illustration partly in elevation and partly in section ofthe dashpot means provided for stabilizing the movements of the yarnengaging instrumentalities; and

Fig. VII is a detail cross sectional view on the line VIP-VII in Fig. I,showing the adjustable weight means whereby the extent of drag inducedin the yarn may be initially regulated and determined.

Referring first to Fig. I, the winding machine there shown will beobserved to be of standard construction in that it comprises a mounting1 which affords a suitable bearing for a spindle 2 upon which the conesare formed. Such a cone is represented at C in the course of itsbuilding, and means (not shown) are provided for driving the spindle 2at a uniform rate'of speed. The yarn indicated at Y is directed to thespindle over a threading bail 3, and laid by a yarn guide iii-adapted tobe shifted back and forth in a direction longitudinally of the spindle2. This guide 4 is supported by a suitable carriage 5 horizontallyreciprocable in a frame 6, said frame being arranged to swing about ashaft 7 journalled in the mounting 1. -The frame G'it will befurthermore noted, is counterweighted at 8 andthus stabilized whenitrecedes as the diameter of the cone increases. The brief descriptiongiven will sultice to make clear the operative relation hereinafterdisclosed of my improved thread tension device to the winding ma chine.

Attention is now directed more particularly to Figs. LII and III of thedrawings wherein the tension device is comprehensively indicated by thenumeral 10, and shown as comprising a frame 11 which is secured by meansof screws 11*, to a bracket 11 projecting laterally from the mountingyarn engaging I 1 of the winding machine. Arranged in spaced relationvertically of the frame 11 are a series of immovable yarn engaginginstrumentalities in the form of circumferentially grooved spool-likeelements 12 which are preferably made of vitreous material such asglazed porcelain affording a smooth, hard, wear resistant surface forfrictional passage of the yarn. Cooperating with the fixed elements 12and adapted to move horizontally in the intervals between them, is acomplementary series of movable yarn engaging instrumentalities in theform of fingers 13 also preferably constructed of vitreous material withtheir surfaces slightly concaved as shown to assist in guiding the yarnas it passes thereover. These fingers 13 are attached to the free endsof arms 14 of stout wire extending in a common plane from a verticalshaft 15 which is supported for rotation by adjustable pivot screws 16set in lateral lugs 17, 17 of the frame 11. Accordingly, as the shaft 15is rotated under the influence of means to be presently described, thefingers 13 will be bodily moved relative to the fixed elements 12 so asto define a more or less zig-zag path for the yarn as shown in Fig, II,and in this way vary the drag thereon. In addition to the fingerelements 13, the shaft 15 carries a guide eye 18 adapted to swinghorizontally within the interval between a companion guide eye 19secured to the frame 11, and the uppermost stationary yarn engagingelement 12, to effect a greater deflection of the yarn Y from'thestraight course than that imposed by the movable finger elements 13. Theshaft 15 also carries at its lower end, another guide eye 20 whichfunctions with a companion fixed guide eye 20 in a manner simllar tothat described with reference to the guide eyes 18, 19. The severalguide eyes ust described are mutually cooperative in defining a truecentral course for the yarn Y in its movement alternately between andabout the engaging elements 12, 13, said yarn passing directly to theguide eyes 20, 20 from the original bobbin or other source of supply(not shown).

The shaft 15 is arranged to be actuated through the medium of mitergears 21, 22, from a horizontal rock shaft 23 appropriately supported byhearing lugs 24 on the frame 11f Projecting radially outward from theshaft 23 is a lever arm 25 which -is coordinated with the movable member6 of the Winding machine through a link 26 best shown in .Fig. I. Thislink 26 is pivotally connected at one end as indicated at 27 to anextension piece \28 suitably attached to the member 8, and its oppositeend 29 is pierced for sliding movement along the lever arm 25. Said link26 therefore acts in effect as a pressure weight capable of beingautomatically shifted to different leverage positions along the arm 25in accordance with the movements of the member 6, thereby imposing,through the various interposed elements already described variations inthe drag upon the yarn in the course of the passage of the latter to thecone 0. In case greater pressure efi'ect than that imposed by the weightof a lever itself is required, an auxiliary Weight such as shown at 30in Fig. I and indetail on a largerscale in Fig. VII, may be-employed,said weight being adjustable along the link 26 and equipped with a setscrew 31 whereby the same can be secured in the desired adjustedosition.

The auxiliary weight 30 is prefera ly slotted as at 32 enabling the sameto be quickly attached and removed when necessary. The link 26 is giventhe angular configuration shown so that in'its movements it may clearthe frame 11 and its appendages.

For the purpose of preventing sudden or spasmodic movements of the yarnengaging instrumentalities 13, there is provided a stabilizing means inthe form of a pneumatic dash-pot means 33 which is coordinated with theshaft 23- and therefore directly operative upon the lever arm 25. FromFig. VI it will be noted that the 'dash-pot 33 includes as one componentthereof, a cylinder 34 which is pivotally suspended from the end of anarm 35 serving virtually as an extension of the lever arm 25, and theweight of said cylinder 34 is counterbalanced so as to be uninfiuentialupon said arm, by a collar 36 set upon the end of the latter. OperativeWithin the cylinder 34 .of the dash-pot 33 with suflicient clearance topermit slow air leakage is a piston plunger 37 having an integraldepending rod extension 38 pivotally attached at 39 to a fixed anchorageprojection 40 of the frame 11. After leaving the fixed guide 19 the yarnY will be observed to pass through an auxiliar directional guide 41secured to the brac et 11 previously referred to, and from the guide 41through a slub catcher generally indicated at 42 and forming part of thestandard equipment of the winding machine.

The motion of the shaft 15 is restricted by an adjustable stop 43 whichmay be conveniently made of wire as shown in Figs. IV and V, bent toafford an abutment 44 for one of the arms 14 attached to said shaft. Theadjustments bf the stop 43 are fixed by a screw 45 provided for thispurose.

p In operation it will be seen that as the upper end of the movableframe 6 of the winding machine recedes during the building of the cone Cupon the spindle .2,

I the lever, and means for automatically shift-- movement thus derivedis transmitted directly to the link 26 with the result that the weightof the latter. concentrated at its end 29 is shifted along the lever arm25 in a direction toward the left as considered in Fig. I, or, in otherwords, toward the shaft 28. The weight leverage effect is therebydecreased and the drag on the yarn Y relieved, or reduced in acorresponding degree, to compensate for increasing linear speedincidental to cone building so that uniform tension is in this wise atall times maintained. In the course of the operation of the tensiondevice, spasmodic movement of the lever arm 25 is obviously counteractedby the stabilizing influence of the dash-pot means 33 so that suddentension changes on the yarn Y cannot possibly take place. v i

Having thus described my invention, I claim:

1. A yarn tension device comprising yarnengaging instrumentalitiescapable of being influenced to vary the drag 011 the yarn, a leverassociated with said instrumentalities, a weighted member with its endbearing on ing the end of the member along the lever to compensativelyvary the drag induced by the yarn-engaging instrumentalities inaccordance with changes in linear speed of the yarn.

2. A yarn tension device comprising yarn= engaging instrumentalitiesrelatively mov-- able in inducing variable drag on the yarn, a leverinfluencing said instrumentalities, a pivoted weighted member with itsend bearing on the lever, and means for automatically shifting the endof the member along the lever to cmnpensatively vary the drag induced bythe yarn-engaging instrumentalities in accordance with changes in thelinear speed of the yarn.

3. A yarn tension device comprising two sets of relatively movableyarn-engaging instrumentalities, one set operative in the in tervalsbetween the other in deflecting the yarn from a straight course toinduce drag thereon, a lever influencing the yarn-engaginginstrumentalities, a pivoted Weighted member with its end bearing on thelever, and means for automatically shifting the end of the member alongthe lever to compensatively vary the drag induced by the yarnengaginginstrumentalities in accordance with changes in the linear speed of theyarn.

4. A yarn tension device comprising yarn engaging instrumentalitiescapable of being influenced to vary the drag on the yarn, a leverassociated with said instrumentalities, weighted means slidable on thelever, means for shifting the weighted means to compensatively varythedrag induced by the yarn engaging instrumentalities in accordancewith changes in linear speed of the yarn,

and means for stabilizing the action of the yarn engaginginstrumentalities to prevent abrupt variations in the drag.

5, A yarn tension device comprising yarn engaging instrumentalitiesrelatively movable in inducing a variable drag in the yarn, a leverinfluencing the instrumentalities, a weight slidable upon the lever,means for shifting the weight to compensatively vary the drag induced bysaid instrumentalities in accordance with changes in the linear speed ofthe yarn, and means directly operative upon the lever for stabilizingthe action of theyarn engaging instrumentalities to prevent abruptvariations in the drag.

6. A yarn tension devicecomprising yarn engaging guides relativelymovable in inucing a variable drag in the yarn, a lever influencing theguides, a weight slidable upon the lever, means for shifting the weightto compensatively vary the drag induced by said guides in accordancewith changes in the linear speed of the yarn, and dash-pot meansdirectly operative upon the lever for stabilizing the action of the yarnengaging guides to prevent abrupt variations in the drag.

7 The combination with a cone winding machine having a movable memberadapted to recede incidentally. to the building of a cone, of a yarntension device comprising yarn-engaging instrumentalities capable ofyielding tovary the drag on the yarn, a lever associated with saiddevice, a weighted member shiftable on said lever, and a directconnection whereby said weighted member is shifted concurrently with themovement of the movable member of the winding machine t9 influence theyarn-engaging instrumentaliing variation of the drag in accordance withchanges in the linear speed of the yarn.

8. The combination with a cone winding machine having a movable memberdesigned to recede incidentally to the building of' a cone, of a yarntension device comprising yarn engaglng instrumentalities capable of.

being influenced to vary the drag on the yarn, a lever associated withsaid yarn engaging instrumentalities, a weighted link pivoted at one endto the movable member of the winding machine and having its-other endshiftably connected to the lever aforesaid whereb-y'the drag induced bythe yarn engaging instrumentalities is varied compensatively inaccordance with changes in linear speed of the yarn.

. 9-. The combination with a cone winding machine having a movablemember designed to recede incidentally to the building of a cone, of ayarn tension device comprising yarn engaging instrumentalities capableof being influenced to vary the drag on the yarn, a lever associatedwith said yarn ent1es for the purpose of. effecting compensatgaginginstrumentalities, a link ivoted at In testimony whereof, I havehereunto 1 one end to the movable member 0 the Windsigned my name at 409Chestnut St. Phila., ing machine and having its other end bear- Pa. thisthirteenth day of December, 1923.

ing on and adapted to be shifted along the ANNA M. PIGEON, lever toautomatically vary the drag induced Adminisfratrim of the estate ofAlbert Ill. compensatively in accordance with changes Pigeon, deceased.

in the linear speed of the yarn, and a weight Witnesses:

adjustable along the link to regulate, the ROBERT EARL MACDOUGALL,

efi'ect of the latter upon the lever. JOHN PUGH HENRIE.

